They do not tell you to begin with that there is no exchange /refund/etc, nothing is put up anywhere in the outlet.
The marketing and sales personnel are very pushy and the experienced personnel can be misleading and manipulative about details you specifically request. Then if there is any issue after payment- they say they cannot help. Consumer court is the only means of any conflict resolution. Too pricey/ false discount/ insurance is useless for expensive mobiles due to police FIR and other complications and gifts are of negligible value.
This was the bad experience I had in the 6th Block Show room of Sangeetha Mobile Stores, next to Al-Bek. Waste of time/effort and money. Unpleasant experience. Hurt feeling of being cheated and duped not being informed of no exchange policy beforehand.